(19)
(11) EP 0 350 312 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.10.1991 Bulletin 1991/41

(43) Date of publication A2:
10.01.1990 Bulletin 1990/02

(21) Application number: 89306888.2

(22) Date of filing: 06.07.1989
(51) International Patent Classification (IPC)5C08L 23/28, B60C 1/00
// (C08L23/22, 23:08)
(84) Designated Contracting States:
AT BE DE ES FR GB IT LU NL SE

(30) Priority: 08.07.1988 GB 8816310

(71) Applicant: EXXON CHEMICAL PATENTS INC.
Florham Park New Jersey 07932 (US)

(72) Inventors:
  • Costemalle, Bernard Jean
    B-1640 Rhode St Genese (BE)
  • Hous, Pierre
    B-3080 Steenokkerzeel (BE)

(74) Representative: Bawden, Peter Charles et al
EXXON CHEMICAL LIMITED P.O. Box 1
Abingdon, Oxfordshire OX13 6BB
Abingdon, Oxfordshire OX13 6BB (GB)


(56) References cited: : 
   
       


    (54) Elastomeric compositions and processes for their preparation


    (57) An elastomeric composition comprising a major proportion by weight of a rubber comprising a halobutyl rubber (e.g. 75 to 95%) and a minor proportion by weight (e.g. 5 to 25%) of a copolymer of an olefin, e.g. ethylene, and an unsaturated carboxylic acid e.g. acrylic acid. This composition may be covulcanised with a general purpose rubber e.g. natural rubber, to which it has adequate adhesion. Thus a natural rubber tyre carcass may be covulcanised with a tyre inner liner formed of this composition.





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